Drilling fixture



Dec. 6, 1949 c. 1 ELLISON El AL 2,490,120

DRILLING FIXTURE Filed July 19, 1946 v 5 Sheets-Sheet l INVENTORfi.

' Dec. 6, 1949 c. L. ELLISON ETAL DRILLING FIXTURE 5 Sheets-Sheet 2 Filed July 19, 1946 INVEN 0R5. CZzlffordZZZZZZzlaan joaziaj o sciza Dec. 6, 1949 c. L. ELLISON ETAL 2,490,120

DRILLING FIXTURE Filed July 19, 1946 5 Sheets-Sheet 5 INVENTORS.

Dec. 6, 1949 c. ELLISON ETAL 2,490,120

DRILLING FIXTURE Filed July 19, 1946 5 Sheets-Sheet 4 INVENTORS. Clffo rdLEZZzLson BY louzlsPo pwcfie/v,

Patented Dec. 6, 1949 111., assignors to ,The Brunswick-:Balke-Gollender Company, 'Chicago, Ill.,-' a corporation of Delaware .-,-Applica,t ion.J uly 19, 1946, .Serial No..6 84,976

24 Claims.

This-invention relates to apparatus for'drilling thumb and finger holes, in a bowling ball, and

more particularly to such apparatus having quick "and accurate means for so positioning the ballas to enable drilling any, desired number of. holes in, a bowling ball withany type ofgrip desired.

"A' major. advantage of the present apparatusis its and accurate arrangement of scales, reduce the possibility of error and provide a rapid means of correctly securing the desired setting.

Among the objects of our invention are: to

provide a novel and improved bowling ball drilling apparatus; to provide apparatusof the type referred to in which the bowlinglball. maybe quickly and easily moved toits variouspositions 'to enable drilling thumb and finger holes in desired and accurate position therein; to provide a bowling ball drilling apparatus having extreme adaptability and ease with which all adjustments maybe quickly andaccurately made; to provide a'bowling ball drilling apparatus in which allof the adjustments may be easily and quickly made without the need of applying a. separate, scale or measuring strip to the surface of the ball; to providea bowling ball drilling apparatus havingv a ball supporting cradle capable of universal swinging movement, and a pairof carriageseach slidable at right-angles with relation to the other; to provide apparatus of the type referred tohavin a universally swinging cradle and a vertically adjustable support for the bottomof the.ball;,to 'provide a bowling ball drilling apparatus having novel adjustablemeans' for controlling the pitch of'holes to be drilled in the ball; to provide a pair of spaced-apart rotatable pitch stops and a carriage-moving lever adapted to contact said stops; toprovide a rotatable pitch stop .having av plurality of projections of different lengths for ,selecti-vely determining and controlling the pitch desired; to provide a universally swingable ballreceiving cradle having chuck jaws and novel means for adjusting said jaws in the cradle; to provide novel means'for swingably mounting a ball cradle about two axes atright angles to. each other ;--to provide means" for swinging a ball cradle about an axis; passing through the center of the ballpand' a pairof independently rotatable annular rings concentric with said" axis and each ring'having a scale member'sothatsaid rings and s'c'ales can be manipulated with relation to eaclr otherfor adding and subtracting "any cradle swinging-measurements about said axis "as desired to providenovel means for j supporting a *bowling ball to be drilled, in any "desired position longitudinally, laterally and angularly; andzto provide novelmeansfor controlling the span';fthe pitch; and the web thickness betweenfingerholes.

Other objects and advantages will becomereadily apparent 'from' the followin idetailedidesclliption taken in connectionwith 'theaccompanying drawings wherein:

Fig. 1 is a top plan view of a bowling. ball drilling apparatusembodyin our invention.

Fig. 2 is a front, elevation..of the-apparatus shown in Fig. 1, witha portion of the base member anda portionof the ,adjustingwheel fonthe bottom carriage broken away for convenience.

. Fig. 3 is a side elevation,looking.toward.the left hand sidex of' Fig. 1 with aportion of. the. ..b,ase member brokemaway for convenience.

,Fig. 4 isa sectionon the line,4T4 of-1Fig.,,3.

Fig. 5 is a section on the line. 5+5. onliig... 1.

Fig. 6 is a development ofthe scalealrl v Winter, and fragmentarily. showingportions of. the..,.adjacent relative1y mov,ableparts, for measuring theangular swinging of..the= cradle .about.its. axis through the supporting pedestal.

illustrated, in, the accompanying .drawing s,. ..-we

have, shown therein for illustrative. ;purposes,,.a preferred embodiment, and wishv it, understood that the same is susceptible of modification and change without departing, from the spirits, and scope of the appended claims.

' In the formshown for illustrativepl r posesjn the drawing our apparatus ,comprises,,a base member I supported upon and fixedtoiopr. supporting legs 2 adaptedto restuponthaflflomor other" supporting.;.suriace. This ,supporting pr base member I is formedwith atransversely extending slot having undercutsides, 3. which serve as a trackway'for. an extension 4 of a can fi e 5 longitudinally slidablebn .the base. member (see Fig. 3).

Carria e. 5 8, p ov d d; at s ri ht hand'endas dv in Fi .w t .depen..-n flan .3 which is- ,rotatably ,mounted, shaft 'Lhaying fixed'at its outer end' a hand wheel 8 having'a handle 9 for rotating the same. Shaft I inside of flange 6 is formed with screw threads I9 threadably engaging complemental threads in a stationary portion within the base member I, so that rotation of handle 9 in the desired direction will cause longitudinal movement of the carriage in a corresponding direction with relation to the base member. Formed in the upper surface of carriage 5 to extend at right angles to the axis of shaft I is a slot having undercut sides II to form a guideway for a second carriage I2 slidable therein. Carriage I2 at its rear end (its left hand end as viewed in Fig. 3) isprovided with an upstanding pedestal I3 which, at its lower portion, is formed with an inwardly inclined strengthening flange I4 integrally, or otherwise as desired, connected to the carriage I2 at its rear middle portion. Pedestal I3 just above the inclined flange I4 is formed with a circular portion I5 having a fiat circular front face I6.

Rotatably contacting circular face It is a similar circular face ll of the circular plate I8, to which is fixed to extend horizontally on both sides of the center of circular plate I8 a rear member I9 of a U-shaped member having the outwardly extending side arms 20 and 2 I. Circular plate I8 has fixed thereto a rearwardly extending stub shaft 22 rotatably mounted in a similar opening in the circular plate I5 and pedestal I3. Stub shaft 22 may be held against longitudinal movement by any suitable means such as a head 23 rotatably mounted in a similar depression formed in pedestal I3. This mounting enables circular plate I8 with the U-shaped member I9-2I to be snugly but freely rotated against face I6 of the circular plate I5 and when desired locked against such rotatable movement by rotation of the tightening handle 24. This locks these parts together in a conventional manner by abutting the end of hub 25 against the rear face of circular plate I5 through the action of screw threads 26 threaded into circular plate I8. There is provided an arcuate slot 21 in circular plate I5 through which the neck of the screw threaded extension 26 passes to permit relative rotation between circular plate I5 and circular plate I8 when handle 24 is turned to loosening position.

Arm 2| of the U-shaped member is formed at its outer end with a, hub portion 28 having an opening therein to rotatably receive the stub shaft 29 of arm 30 of the cradle member 3!. The adjacent faces of hub 28 and arm 30 are fiat as shown at 32 to facilitate snug but free rotation of arm 39 with relation to hub 28. Arm 33 of the cradle at its outer end portion is formed with an outwardly extending hub portion 34 having a fiat face 35 which rotatably rests against and contacts a similar circular flat face 36 on the hub extension 3! of arm 20 of the U-shaped member. The hub 34 of arm 33 is provided with an outwardly extending stub shaft 38 rotatably mounted in a cylindrical opening 39 in the arm 29 of the U-shaped member and its hub 31.

As seen at the right hand side of Fig. 1, the hub extension 31 is reduced in diameter at 49 to rotatably receive a pair of circumferentially slidable annular rings M and 42. Ring 4! is provided with a handle 43 and ring 42 is provided with a handle 44 so that these two annular rings may be selectively and circumferentially slid as desired around the cylindrical hub extension 48. Annular ring 4| has fixed to its upper surface a graduated scale 45 and annular ring 42 has fixed at its upper surface a graduated scale 46. The outwardly extending hub 34 of the cradle arm 33 is provided at its extreme upper middle portion with a pointer member 47 fixed thereto. From this it will be understood that the scale members on annular rings 4| and 42 may be selectively manipulated in one direction or the other by handles 43 and 34 to add or subtract measurements of holes to be drilled in a ball held in the cradle. After such addition or subtraction manipulations have been completed, the straight edge of the pointer 4'! on the cradle may be moved in the appropriate direction to the appropriate reading on one of the scale members 45 and 48. This swings the ball held in the cradle to proper position for drilling.

Cradle 3I may be locked against rotation in the U-shaped member by rotating in the desired direction the lock handle 48 fixed to the locking hub 49, the construction of which is similar to that described earlier herein in connection with locking arm 24 and locking hub 25 of the rotatable circular disk I8 of the U-shaped member. To effect this looking or loosening operation the lock hub 49 is formed with a thread end 50 threaded in a threaded opening in the hub 34 of cradle arm 33 and having an unthreaded portion slidable in an arcuate slot 5i in the hub extension 3? of arm 29 of the U-shaped member.

Pivoted at 52 to the outer end of arm 30 of the cradle is a lever 53 outwardly bowed at its intermediate portion and having at its opposite end a straight portion 54 having near its outer end a slot 55 for receiving the rod 56 pivoted at 51 and formed at its outer end with threads 58 threadably receiving the locking wheel 59 which is provided with an integral hub portion 53 adapted to bear against the outer face of portion 54 0f lever 53. By this construction it is seen that lever may be locked in position or if desired may be unlocked and swung outwardly a desired distance to permit the deposit in the cradle of a bowling ball.

When the bowling ball is deposited in the cradle it is there locked in position by three chuck jaws 6!, 62 and 83. Jaw BI is pivoted at 94 to a mid point on lever 53 and. jaws 62 and 63 are respectively pivoted at 35 and 36 to the extensions 6'! and 68 of plate 39. Plate 59 is mounted for lateral sliding movement in an elongated slot '59 in the cradle and sufiiciently greater in size to permit lateral movement of plate 89 therein.

As seen in Fig. 5, plate 69, at the axis of rotation of the U-shaped member, is provided with an upwardly extending slot TI on both sides of which the plate 59 has threaded openings '!2 and T3 in which are tightly screwed a screw M upon which is threaded the adjusting wheel 7 5 rotatably mounted in the slot 79 formed in arm 33. As will be understood in Fig. 5, rotation of adjusting wheel 15 will move threaded screw 74 in one direction or the other to swing the plate 39 inwardly or outwardly (depending upon the direction of rotation) in slot 76 to advance or retard the chuck jaws 62 and 63 with relation to the cradle. Each of the chuck jaws SI-33 is preferably formed on its inner side with rubber cushioning pads TI to prevent marring or scratching of the polished surface of a ball clamped in the cradle.

Referring to Fig. 3 there is provided on carriage I2 an upstanding block I8 having threads 19 upon which are threadably mounted the adjustable supporting block 89, which by rotation may be adjusted at any desired height upwardly or downwardly so that its upper face forms a supporting surface for the bottom face of the bowling ball clamped in the cradle. This adjustment is :fsuchi as-r to-gsupport the .balhimthe. cradleflso that the center of the ball l willxat all times-,coincide .-;=wi.th :thexintersection :oirthetwo. rectangular-taxes .ofathe cradle and-the. Urishapedmember.

x-nBy' coincidence athe rdiameter of 1. the -t-.ball

illustrated in ithe drawing? happens to be the same ..as-' the .2 diameter of -.:the :circular. .hub 34 .of: the cradle; and cthe... same as zthe ;i' diameter of .the 1: circular .=plate -18 ::.'of Lthe .Ue shaned (member, 1 hence the; circles representing; athese icircularhubseor; plates. inl--.Figs.w:2 and.:3-. may also be: assumed to -represent a bowlingnball zclampeduin .thecra'dle. :Figs; 2::and 3 also ,uillus- -trate .how'the: bowling -:ba1l.rissupported :iniathis position by the adjustable. blocki flfls refemredbto .aboye. Should, :for. any reasongit be de'sire'd that the ball be supported at any other heightpsu'ch iadjustmentgmaymbe made by rotating the supi-portingblock- *8 B in one direction or the other to :increase or 'decrease the height of itsuppefiace; V

giddewayby-swinging "the lever 8 tin thedesired direction.

Lever 8 t at a slight distanee'irom the left hand side or carriage-I2; as viewed Figzij has fixed thereto a stop member' -84 projecting a a predetermined I distance on each-of the-"side edges of-this lever. PivoteLlly mounted for horizontal rotation upon-pins 85 and =8fi are a pair" of spaced apart pitchstops'8l and 88. Pins 85 and 86*are mounted 'in the upper surface of carriage 5.' *Aspit-chstops 81 and 88 are of similar construction; exceptjfor being inverted one with relation-to the other, only one-mi thesened" be describedin-detai1. Re- =-fer ring in--'- deta;il 'to pitch stop-'81 ilr-Wlli be seen 'iirF-ig; 3 that the same comprises' a body portion of medium' thickness having a plurality of'out- =wardly extendingprojections; a, b; c,'-d;" e; i gfh,

. ig-and j KFigA l). I Progressing"fromprOjectiOna toprojection'y' it will be seen that these projections are each slightly shorter 'thafithe-one-preceding it. While any desired difierencey in length between the successive stops may be used as desired," foraillustrative purposes inthe "drawings these stops. are 'shown in Fig. 4 asdecreaslngiin length by e; of an inch-froma to a.

' When the pitch lever- 8 I stands at rightangles .toi the. l'ongitudinal: axisof movement of carriage --will -be-zero. This means that ahole=drilled into therbalhwbvdrill 89 (Fig. 3) -if-extendeoliiar cnou'gh would have-its axis passing' throughthe center oi the ball; which would mean aholeWith no pitch. Assuming that 'the'hole' to -be' drilled in lthe ,ball.- is .to have a- 'a e 1 pitch one or the other of the pitch stops -89 and 88- -(depen-ding'-u-pon which. side of :the :center 5 line'- of the ball the hole isbeing dril1ed)=:wi1l=be rotatedto =bringits longest projection w toaextend toward the-stoprmember fitronethei lever 8i. i Assumlng' that the thumb h'ole 9' 0E thesball 'shown; in Fig 8==is=to"-be"-positionedsonsithes" right: side: of" ther-vertical center line through the ball twhen' the 'cradle is posi .it-ioned ins. a horizontal plane) handy-one: oretwo ifinger holes 9| and 92. are to bezpositionedionithe .rlefthandrside when. the, cradle. isx-horizontalsuas viewed in Fig. 3, the operation of-the pitch" stops :willnow. be explained.

; In drilling;a.,thumb hole torhavewypitchrthe ,pitch stop '88 (Fig. .4) y will be rotated tonswin rthe :projection a .to be directly,oppositetheaadiacent edge aoiastop member 84 of lever. 8|;it being-rassumedfithat .the lever at this time'standsr wits neutral position to wit: .atrightianglesiiztoiithe dongitudinal axis of movement of thecarriage-Tfl. .This means that the space between the adjacent xedge ofa-stop member8 lv of.lever 8| asviewedain Fig. 4; will-be e of an inch away fromtheroutermost-end of projection a. Lock lever 93awill-now ...be rotated a slight distance to releasecarriagefl .for movement with relation to carriage- Starter which. the lever 3| will be swung forwa-idlyeas viewed in Fig. 4 until stop member 84 contacts 'the outermost end of projection a. This moves the ball forwardly as Viewed in Fig. 4 to 'bring'its center inch forward (downward asviewed'dn Fig. 4 andto the right as viewed-in Fig. 3); beyond the position shown in Fig. 3. '"This will result=in the axis of the drill entering the ball to-the' rear -(left as viewed in Fig. 3) of the center-"of the ball. As will be later more fully understoodfi'the cradle will be swung in a counter-clockwisedirection as viewed in Fig. 3 so as to rotate *the ball for properly positioning the point of the ball where thedrill will enter for drilling the thumb -hiole. =As also later more fully explained; the cradle will .be-further swung a slight distance in counterclockwise direction as viewed in Fig: 3 in compen-- sation for the offset in the forward .directioniof the ball center for determining the" pitch. "'"In "other words, the cradle as viewed inFig. 3=Willbe swung in a counter-clockwise direction such an amount as necessary to bring the axis of theidrill directly'above the center of the place where the thumb hole 'is to be drilled with the desired pitch.

If the amount of pitch for the thumb. holeis to be greater than 5 of an inchflche pitch. stop .88 will be rotated by its handle 94 to bring whichever projection correspo-nds to .the desired amount of pitch, opposite the. adjacentside Jof "thestop member 8% of pitch lever 8|. .Pitch. stop 81 is also provided with a handle 95 for rotating it to bring any desired oneof the pluralitygof projections (1-9" in alinement with the point:.of

travelv of the stop member 535 of, the lever .8l. When pitch stop 81' is in the desired position the lever Sl'is swung in the opposite direction...to =55;

movethecarriage. l2 rearwardlywhen drilling one or. more finger ,holes. This will move :;the .1 center of the ball. bodily rearwardly '(tolthe'qlft as viewed inFig. 3) which will placethepiteh angle into .the front half of the ball. -It willtbe understood that before causing the. drill to enter the ball fordrilling the finger holes theballtwill have been swung. in, a clockwise, direction..as viewed in'Fig. 3 to move the last drilled-thumb hole a distance equal to the space between the thumb hole and finger hole plus one half of the diameter of the finger hole plus the distance .the ball was bodily moved rearwardly to, set,up,.- the desired pitch. If the ball is to. have only a single finger hole drilled therein, the drill -will.now..be forced the desired distance into the ball.

' Whenit is desired to. drill two'fingenholesfin the ball; the bottom carriage 5 will,be.moved:1on-

gitudinally by rotation of, l1andle..9...andl.'1hand wheel 8 a distance from its neutral positionequal is to onehalfpfthe"width of "the bridge or web between the finger holes plus one half of the diameter of the finger hole to be drilled. When this finger hole is drilled the handle 9 and handle wheel 8 will be rotated in the opposite direction to move the center of the ball and carriage in the opposite direction a distance equal to one half of the finger hole already drilled plus the thickness of the bridge or web between the finger holes plus one half of the finger hole yet to be drilled. While the finger holes are generally drilled in a direction parallel to each other, it might sometimes be desirable for special balls to have the finger holes drilled at various angles with relation to each other. This may be effected by either or both swinging the U-shaped member (which carries with it the cradle) in either a clockwise or a counterclockwise direction depending upon which of the two finger holes is being drilled, and moving the carriage 5 in the desired direction.

In order to measure the amount of movement of the bottom carriage 5 in either direction, the base member I has longitudinally slidably mounted in a dovetail recess a scale member 91 having'upon its upper face inclicia 53 in desired graduations, and also slidable in a parallel direction closely adjacent scale is a similar scale 99 mounted in a similar groove in the base member as seen in Fig. 3. Scale ti has an upstanding handle N38 to be rasped by the operators fingers for sliding the scale a desired amount in its dovetailed groove. Scale 99 is provided at its opposite end with an upstanding handle HJI which enables sliding of this scale in the desired direction and to the desired amount. Fixed to carriage 5, and within a slot I02 formed in carriage i2, is a plate carrying a pointer lil i movable longitudinally of both of scales 9'3 and 99 upon movement of carriage 5. Slot I62 is large enough to permit all necessary movements of pointer with relation to carriage I2 upon movement of carriage 5.

Scale means is provided for indicating the amount of swinging movement of the U-shaped member l8 about its axis perpendicularly to the circular disc l8, and comprises a scale H35 fixed to the upper edge of disc 58 and a plate 256 fixed to the upper edge of circular disc 55 and having an indicating mark Iii'i which should register with the zero of scale I E35 when the U-shaped member I9 stands in a horizontal position The amount of rotation or swinging movement of the U-shaped member with relation to the circular disc I5 may be read on scale 5G5 with the pointer mark I01.

From the above the operation of our bowling ball drilling apparatus will be understood to comprise first settin all of the scale-s described earlier herein at zero, so as to have the carriages and I2 positioned with the center of the ball, clamped in the cradle, into registry with both axes of rotation of the U-shaped member and the cradle and in registry with the axis of the drill, with the shift lever standing in neutral position and both the U-shaped member and the cradle being level in a horizontal plane. These various parts will be held in such neutral position until movement of any one of them is desired at which time the clam-ping means for that part will be loosened.

Assuming a bowling ball to be clamped in the cradle with its bottcmmost surface resting upon the top face of the adjusting block 85, and the ball in the relative position referred to above, the ball is now ready for adjustment to its varions positions for drilling of the thumb and finger holes by the drill 89.

To drill the thumb hole, the cradle is first swung in a counterclockwise direction as viewed in Fig. 3 one hall" of the span between the thumb and finger holes plus one half the diameter of the thumb hole plus the amount of pitch desired to .be formed in the thumb hole. The pitch stop 88 is next rotated to bring the desired projection, corresponding to the desired pitch, into the path of movement of the stop member 84 of lever BI, after which locking lever 93 will be released and lever 8| swung forwardly until stop member 84 contacts the projection corresponding to the pitch to be formed in the thumb hole. The thumb hole is then drilled to the desired depth.

Assuming the ball is to have only one finger hole the cradle is then rotated in a clockwise direction as viewed in Fig. 3 a distance equal to the span between the thumb and finger hole plus one half the diameter of the finger hole plus the amount of pitch to be given the finger hole, after which the cradle is locked against further swinging movement. The pitch stop 8'! is then rotated to bring opposite the stop member 84 of lever 8| the projection corresponding to the desired pitch, after which the pitch lever BI is swung rearwardly until member 84 strikes the selected pitch stop projection. The finger hole will then be drilled to the desired depth. Should it be desired to drill two parallel finger holes, the carriage 5 will be moved a desired distance to one side or the other (depending upon which finger hole is to be drilled first) which will bodily carry the ball in that direction with relation to the point of the drill 89. The amount of such movement may be read on scales 91-99 with pointer I94. This finger hole is then drilled a desired depth and the carriage 5 is then moved in the opposite direction a distance equalling one half the diameter of the finger hole already drilled plus the thickness of the bridge or web between the finger holes plus one half of the diameter of the finger hole yet to be drilled. The second finger hole is then drilled to the desired depth. Should it be desired to have the axes of the finger holes at an angle to each other, this may be efiected by swinging the U-shaped member or circular disk I5 a desired amount and then readjusting by movement of the carriage 5 to bring the point of the drill to the desired point for starting the hole. The same operations may be carried into effect for producing an angularly inclined axis to the other finger hole before actually drilling the same.

Precise control of the amount of swinging of the cradle with relation to the U-shaped member may be accomplished by setting the scale members -46 into the proper position for the measurement desired, and adding or subtracting such distances as required by manipulating handles 43 and 44 to move scales 45 and 46 in an additive or subtractive direction as required. By so manipulating scales 45 and 46 and finally setting the pointer 41 in the proper position with relation to these scales, the ball will be in position to have the desired hole accurately drilled. Should the ball have two finger holes the carriage 5 will be moved longitudinally to accommodate for the web or bridge thickness between the finger holes, and should it be desired to have angularly arranged axes to the finger holes this may be accomplished by swinging the U-shaped member I9 in the desired direction and compensating for the same by appropriate sliding of carriage 5..

amen-ac afirst-axis paralllto'the'direetibn' oi -movement of said carriage and about a 'secondaxis per pendicular to the first axis; apluralit-y of *chuck jaws-insaidcradle;- and-means for simultaneously moving said jaws-inwardiy andoutwardly with relation to the erad-l;

9 H In bowling ball 'drilling apparatus; a- Stationary base member; a first carriage' slidable ion and transversely" of said-"baseunember; a second thesecond carriage and -move therewith, and mmarriage on'th'e first carriage and slidable' at right means mounting said cradle on" 'said arm for ad justmentabout a firstasis paralleltd'th'e direction of movement-of "said second-carriage f and? aboutasecondaxis perpendicular-"to the first axis:

23" Bowling"-ball- '-dr-i11ing' apparatus as-claimed" in" c1aim-l,- having fiiied' on "said 'sec'ond carriage e an upstanding vertically adjustable ball support adapted tohave its upper surface in contact with' anglesth ereto';-an-upstandiiig pedestal on-the sec on'd carria'ge' and having a fiat face thereabove; a diskrotatably 'slidable" on said fiat" face on a firstaxis parallel-witnthelongitudinal center line member-fixed'to saiddi'skia second cradle mem ber rotatably mountedonthe arms "of' the first cradle member;*and'about an'axisat right angles to first axis and scale members to indica t the bottom: of the tan wit-n thecenter of 'the'ball' k v a unt movement sa d' vable parts? at-alltimes in-"alinement wi-tlo'the axes of i'otationof the universally swingable cradle.

3 Bowling pal-1* drilling apparatus: comprising, a suppcrting 2 member, acarriage'slidable withlilj- Bowling half-drilling "apparatus as "claimedii in" claim 9, having means for relea-sably fastening"? said"movabl'e partsiri their "various "selectively" adjusted positions *for controllingth'e span"andr' said carriage for positioning and-holdiiig a bowling ball; a swingabl lever having-adjacent one enda fulcrum beyond one "edge. of "the carriage and ar-tic'ulated With-relation to the 1 carriage to bowling ballheld'in said second cradle member."

11-. Bowiing ball dri'llingap paratus, comprising; a-staitionary "base member,a carriage supported on and .slidable with relation .tolsaid base 'meni move the same when the lever-is swungyand ad ap fdestal fixed-to said tar a' eia.U-shaped illsable stops---beyond the opposite-:edg'e of the carriagetd selectively contact a side edge of the lever to control the pitch of a hole to be 'drilled' in the ball.

member rotatablYmounted omsaidfpedestal for? swinging 'm'overn'entona*horiz'ontal axis,"a'cradle rotatably mounted on said 'u shapedinember'fdr rotation thereon" about anaxis at'rig'htangles' to z 4: In: a bowling balli drilling apparatus, a sta-z the axis' 'of*rot'ation' of the'iU sh'ape'dinemberfone of theside members' of the-cradle having aneldn' 'f gatedsl'ot, a'p-late in" said slotfa chuck jaw inem b'e'rmount'ed'at-eachendbfsaid plate'fand means for=adjustablyslidingtsaidplate to move said j'awj lever:- for 1 sliding: the second: carriage :having zone: 40 members in thecradle.

end pivotally connected to isai'd rcarri'age zaepitch': stopzrotatably mountedzon.the same carriage and having: projections of different ilengths5adapted i to selectively contact ".the lever: when: theileverl swungethereagainst; and means: connecting; a other-part? ofizss'aid ileVeFatO the*other'zcarriages'. 5.:Bowlingrball drilling .apparainish'asazclaimed in claim? 4;: in :which' is. providednasecondcpitchlz stop rotatablyxjmountedaonthe:flrst carriage ands 12;"Bow1in'g ball" drillingiapparatus as claimed in"c1a';im"1 I; in whichsaidfiaw members are piv otally mounted"adjacent"theirespective endslof the plate;-saidcradle "havingta swingably ,mounteel-sidearmrela'sabiy se'curedon one side thereof.

13. Bowlingb'all drilling apparatus comprising, astationary base member-gt. "first carriage'slidablyl; mounted bu thefba-S'membr'a second carriage; slidably mounted on the first carriage for move-J1 spaced lsfromtthe :firstnnentidnedmitch stop iinr a iw ment at'right'an'gles' to the line 'of. movement. f?

direction: longitudinally's'of the "rse'condccarriage each :20 saidipit'ch zstops i having 1' proj ecti'onsrofs progressively"increasing:radial lengths so thatthe e pitchitstops may :be 1 selectively rotated torpresente 1- the first carriage, an upstanding pedestal flied .1 to"the'second"carriage"and having a flat face, a U'-shaped yoke member h'aving'a fiat face rotat able againstth'firstfinentioned "flat face aboutl projectiorisnoi desired :lengths ntoward' 'thevlevwi55 anaxispara'llelwithftlie line of movement of the to bei selectively contacted by the le'verito' deter- 1 mine the pitchiof-sthumbrand'ifingerz holesato bet drilled in the :ball;

6:. Bowling -ball drilling apparatus as =claimed second carriage with'rel'at'i'o'n to the first carriage, '1 a j cradle rotatably"mounted Lin saidI yoke .mem.-. be'ri'and'havinga flat face portion rotatably con-.

in-iclaim 4;ih'aving atuniversally sw ingablecradle oo outstanding arms of the U-shaped-yoke member,

the "axis "of rotation of "the cradle with'frelationn to the yoke'member being at 'right angles to; the.

axis of"rotation' of "the yoke member .withmlaa.- tionto'the 'pedestalfand a lverpivotdtmthial first" carriage and articulated fwithithe .second;

carriage for sliding the latter asthe lever is swung. 14."Bow1ing ball drilling apparatus-as claimed-Q.

in claim "13,"having scale lmeans on the edgeso.

the cradle .flat 'face .portionnandlthe Qyok'e .mem.-.-.

ber arm fia't face portion.fonregisteningrthespanl of thumb and "finger holes tote drilled .in= a ball; to.be held'linLthe cradla pitchlstops en -thenrst g carriage, against ,which ..said lever is adaptedtoe.

contact 'for determining the pitch of said holes,

said cradle on said pedestal for adjustment about and scale means on the base member and the a base member, a first carriage slidable on the base member, a second carriage slidable on the first carriage at right angles to the direction of movement of the first carriage, an upstanding pedestal on the second carriage, a U-shaped yoke member rotatably mounted on the pedestal, a

cradle rotatably mounted in the yoke member for rotation about an axis at right angles to the axis of rotation of the yoke member, one of the outstanding arms of the yoke member having on its inner side a hub provided with a contact face, the adjacent arm of the cradle having fixed on its outer side a circular boss extending to and in rotatable contact with the said contact face of the yoke member arm, a pair of independently slidable annular rings on said hub, a pointer on the inner edge of the circular boss, and a curved scale on the outer circumferential face of each of said annular rings for coaction with said pointer.

17. Bowling ball drilling apparatus as claimed in claim 16, having scale means for registering the amount of rotation of the yoke member with relation to the pedestal.

'18. Bowling ball drilling apparatus as claimed in claim 16, including a pair of rotatable pitch stops on the first carriage spaced apart longitudinally of the second carriage, and a lever pivoted to the first carriage on the opposite side of the second carriage and articulated with the second carriage for sliding the same, said lever when it is swung contacting one of the pitch stops for controlling the pitch of a hole to be drilled in a ball held in the cradle.

19. In a bowling ball drilling apparatus, a ball holding cradle, a U-shaped yoke member having ,7 outstanding arms in which said cradle is swingably mounted, one of said arms having on its inner side a hub provided with a contact face, the adjacent cradle arm having on its outer side an outwardly extending cylindrical projection contacting said contact face for sliding rotation therebetween, a pair of independently slidable annular rings on said hub, a pointer on the cylindrical projection, and an independent scale on each of said annular rings for coacting with said pointer, to enable manipulation of said scales and pointer to set the cradle in proper position for enabling the drilling of a hole with predetermined characteristics in a ball to be held in the cradle.

20. In a bowling ball drilling apparatus, a base member, a pair of carriages movably mounted on said base member for movement in directions at right angles to each other, a universally swingable cradle mounted on one of said carriages for holding a bowling ball in various positions, means mounting said cradle on said one of said carriages for adjustment about a first axis parallel to the direction of movement of one of said carriages and for adjustment about a second axis parallel to the direction of movement of the other of said carriages, means mounted on said carriages for controlling the pitch of holes to be drilled in the ball, and means on the cradle for 12 controlling the span between the thumb and finger holes in the ball.

21. Bowling ball drilling apparatus as claimed in claim 20, including means on one of said carriages for controlling the web width between finger holes to be drilled in the ball.

22. Bowling ball drilling *apparatus comprising, a supporting member, a carriage slidable horizontally on said supporting member, means on the carriage for supporting a ball, a lever for sliding said carriage and a stop indexable about an axis stationary with relation to said carriage and with which said lever contacts to control the pitch of the hole to be drilled in the ball, said stop being separate from and unconnected with said carriage and spaced laterally from said lever and being formed with a plurality of surfaces different distances from its axis, said stop further being rotatable in a plane substantially that of the plane of movement of the lever, to selectively present a desired surface for contact with the lever.

23. Bowling ball drilling apparatus comprising, a supporting member, a carriage slidable horizontally on said supporting member, means on the carriage for supporting a ball, a lever for sliding said carriage and a stop indexable about an axis stationary with relation to said carriage and with which said lever contacts to control the pitch of the hole to be drilled in the ball, said stop being separate from and unconnected with said carriage and spaced laterally from said lever and formed with a plurality of projections of different lengths, said stop being rotatable to selectively present a desired projection for contact with the lever, and a second similar stop spaced from the first mentioned stop in a direction lengthwise of the carriage, whereby to selectively control the pitch of a thumb hole and a finger hole to be drilled in the ball, said lever being swingable between said stops.

24. Bowling ball drilling apparatus comprising, a supporting member, a carriage slidable horizontally on said supporting member, means ;.,on the carriage for supporting a ball, a lever for sliding said carriage and a stop indexable about an axis stationary with relation to said carriage and with which said lever contacts to control the pitch of the hole to be drilled in the ball, said stop being separate from and unconnected with said carriage and spaced laterally from said lever formed with a plurality of projections of different lengths, said stop being rotatable to selectively present a desired projection for contact with the lever, and a second similar stop spaced from the first mentioned stop in a direction lengthwise of the carriage and on the opposite side of the lever, whereby to selectively control the pitch of a thumb hole and a finger hole to be drilled in the ball, each of said stops having a handle for selectively rotating the stops to the desired position of pitch adjustment.

CLIFFORD L. ELLISON. LOUIS POSPISCHEK.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,269,946 Lange Jan. 13, 1942 2,356,300 Boettcher Aug. 22, 1944 

